So I built the Mountain’s Windchime. Ogo shows up, chime takes effect, and they become peaceful. They’ve been hanging around my town for days and days. They looked around for the first couple days but now just stand still. The “pig-snoring” sounds are eating at my soul. Any way to get them to leave?

Ok, after taking a look, you have a pending notification from the quest, @shadow_of_ender.
Go to the bulletins / notifications panel (the exclamation symbol) and scroll down to the bottom. There’s a gift from the Ogre. Accept it and they will disappear.

There’s some unintended behaviors with the bulletins. Sometimes a notification will get obscured by another one (already opened) and won’t pop up. The whole notification system will need to be revisited at some point